Apparatus for treating rubber footwear.



' A. A. GLIDDEN, E. P. DORMAN & Gf L. FINCH.

'APPARATUS FOR TREATING RUBBER FOOTWEAR.

APPLICATION FILED JAN-21.1915. v Patented June 0,1917.

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A. A. GLIDDEN, E. P. DORMAN & G.. L. FINCH.

APPARATUS FoR TREATING RUBBER FooTwEAR.

APPLICATION FILED 1AN2I. i915. r

Patented June o, 1917.

5 SHEETS-SHEET 3.

A. A. GLIDDEN, E. P.-D0'RIVIAN,& G. L. FINCH. APPARATUS FOR TREATING RUBBER FOOTWEAR.

APPLICATION FILED 1AN.2I. 1915. 1,228,9040

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"A. A. GLIDQEN, E. P. DORMAN a. G. L. PINCH.

APPARATUS FOR` T REATING RUBBER FOOTWEAR. APPLICATION mso 1ML-21. 1915.

192254. Patented June 5,1917.

5 SHEETS-SHEET 5.

L. E'INGH, 0F BRIGHTON,

` ALFRED A. GLIDDEN, OF WATERTDVN, EDGAR Il?.` DORMAN, `0.'53 BOSTON, AND GEORGE MASSACHUSETTS, ASSGNGRS TO HOOD RUBBER 00 WAERTOWN, MASSACHUSETTS, A CORPGRATGN 0F MASSACHUSETTS.

APPARATUS FR TREATNG RUBBER FOTLVEAR.

Specification of Letters Patent.

Application filed January 21, 1915. Serial No. 3,573.

To all whom t may concern:

Be itv known that We, Annina) GLinnnN, l

Apparatus for Treating` Rubber l `o`ot\vear,o

of Whith the following is a specification.

Our present invention relates to an apparatus forfapplying fluid pressure to the out-- side of plastic articles such for example as rubber foot wear, While upon the lasts or forms upon Which they are formed or assembled and prior to vulcanization For convenience we' will hereinafter describe our invention as embodied in an apparatus for treating rubber footwear', but it will bc understood that we do not limitourselves to this particular use.

Heretoforc in the manufacture of rubber foot Wear, as the various parts or pieces are applied to the last, it has been customary .to roll or press them into position by a hand roller-or device requiring considerable labor; which, if not thoroughly performed, produces defective articles.

It has been found that this pressing' or compacting; of the shoe nraterial on the last may be advantageously performed by air or other fluid pressure after asseuibly upon lasts and prior to vulcanization, thus elimi i nating lnuch of the hand `labor and producing a, more uniform product.

The object of the invention is to provide a simple, economical and efficient apparatus by which a compacting` air or other lluid pressure may bc applied to the foot wear rapidly and which.will be as nearly automatic in its action as practicable. thcreby enabling the foot wear to be treated in large numbers with the aid of a minimum amount of unskilled labor.

lVith these and other objects in view, the inif'ention includes the novel features of conl struction and arrangement and combination of partshereinafter described and particularly pointed out in the claims.

An einbodnneut of our invention .is illustrated in the accomlninying drawings in which:

Figure l is a side elevation of the complete apparatus with parts broken away and parts in sectione isa transverse vertical section-fof..

rammen aan@ 5, 1era f the saine on the line 2-2 of Fig. l on an enlarged scale.. l

Fig. z2 is a detail of the clutch, locking disk. i

Fig. Sis an enlarged transverse section thro-ugh one of the receiving cylinders showing the relative position of shoe-carriage therein.

Fig. l is a side elevation.ofI the parts shown in Jig. 3 partly in sectionand with the cylinder omitted.

Fig. 5 is a sectional plan View of the valve centrolliirgr mechanism.

Fig. is a. detail face view of one of the valve controlling cams..

Fig. 7 is a similar view of the other valve controlling cam, showing its proper relation to the irst, and,

Fig. 8 is a sectional detail of one of the perforated metal lasts with a` rubber shoe thereon.

Fig. 9 is a transverse nioditication.

Fig. 9 is a sectional detail.

Fig. l() is a side elevation of parts shown in Fig. 9 with the cylinder omitted, and

Fig. ll is a detail plan View.

ln these drawings, We have shown as an example an apparatus adapted for Yhansectional view of a dling tour sizes of rubber overshoes.

This apparatus comprises a pair of cylinders l?. closed at their outer ends by the covers 17 and open at theirY inner ends,

which inner ends are spaced from each other.

as shown. Between these open ends of the cylinder is located a reciprocating head 16 which has its opposite faces adapted to hernietically close the open ends of the cylinders when brought into contact therewith, by means of packing rings or gaskets 16.

Projecting from each face of the head is a last carrier which is shown in the drawings as taking the shape of a hollow rod or bar 2l which is designed, when the head is in Contact with and closes the mouth of the cylinder, to lie within and extend practically the entire lengt-h of the cylinder'. The outer ends of the bars 2l are provided' with anti-friction rollers or Wheeled carriages 44 traveling on tracks 48 in the bottoms of the cylinders. These hollow barsQl communi,-

'phere through said hollow bars.

cate with the atmosphere throgh the head, and are provided with faces 19 and nipples 19a adapted to engage and support the hollow lasts A so that the interior of said lasts will .be in communication'with the atmos- It will be` understood that the lasts are perforated so that any air imprisoned between the lasts' and shoes is freefto escape to the interior of the lastswhen pressure is applied tothe eX- terior of the shoes.

By causing the head to reciprocate so as to close first one cylinder, 'and then the other, the shoes carried by the bar upon one side may be subjected tothe Huid pressure within the cylinder while the other bar is being loaded, or the treated shoes thereon if any replaced' by untreated goods.

While various means might be adaptedfor supporting and reciprocating theI head 16, We prefer to use hydrauliecylinders 1 ,within which are located pistons 2, the piston rods 3 of which project through suitable stuffing boxes on the heads 4 of the hydraulic cylinders and are secured to projections or parts of the reciprocating head 16 by means such vas nuts 11.

The pressure fluid for operating the pistons to reciprocate the head is supplied by pipe 61 connected to any suitable source (not shown) of fluid under pressure, this pipe connecting with a four-way valve-casing 58 from. which vpipes 61"t and 61b lead to opposite ends of the cylinders with which lthey connect by branches 60a and 60h.

y A Waste pipe 51a also connects with the valve casing 58. The fluid pressure to each of the cylinders 12 is supplied by a pipe 59a leading from any suitable source of fluid under pressure (not shown), this pipe coinmunicating with a three-way valve casing 59, which latter connects by pipe 59b .with

the end of the cylinder through head 17 The three-way valve casing 59 is also provided with a waste or exhaust outlet indicated at 59).

' In order to secure the proper sequence of operations and to save the time of the oper-L.

ator, we providea mechanical appliance, which, once started by the operator, cQntro\ls the hydraulic supply to the cylinders and allows the proper time to elapsefrom' thel admisiion of pressure to the hydraulic cylindesfor the head 16 to close either cylinde.v before admitting air under pressure' to this cylinder.

' This device comprises a continuously runl .ning sprocket 62 carrying on its face one member 63 of a jaw clutch, which is mounted freely on a shaft 64 supported in brackets 65 from the frame of the apparatus. Two

i cams 66 and 67 are keyed to this shaft, and

control respectively through cam levers and sprockets and chains, the hydraulic and air valves as hereinafter .described The other'y AInemberr76 of the'j-aw clutch is keyed to the Ashaft but'is free to reciprocate on it, so as to allow of engagementand ydisengagement `v of the teeth. This member carries a disk 76 provided with notches orinterruptions 76' diametrically opposite. Then the clutch member 76 is forced by lever 68 into 'enga-gement with the member carried on the sprocket, it is held in engagement therewith (as soor as it has rotated a few degrees) by a locking piece 78 which bears on the face of the disk.

The hydraulic control cam 66 has a groove on its face in which rides a cam roll 7 9u carried on a lever arm 7 9. This lever arm is keyed to a sha-ft 69 on the opposite end'of. which is keyed a sprocket 70, connected by a chain 7 0, to a sprocket 70b on the spindle of the four-way valve 58.

The air control cam 67 has a groove in its face in which ride two cam rolls 71u and 72a on opposite diaineters,carried on lever arms 71 and 7 2 respectively. Lever arm 71 is mounted on a shaft 73 on the opposite end of which is keyed the sprocket 75, connected by a chain 7 5L to a sprocket 7 5b on the-end of the spindle ofthe 3-way valve 59, of the right-hand cylinder (Fig. 1) and lever arm 72 is carried by shaft 73'dL which in turn bears a s rocket v75C which is connected .with sprocket 5F on the spindle of valve 5 9 of the yleft hand cylinder, (Fig. 1), by a chain 75e.

y Operation.

63 and the apparatus comes to rest and remains in this. condition until started up again by the operator. A

As the shaft 64 starts to rotate, the rise on cam ,66 imparts movement to lever arm 7 9 out of engagement with the clutch member which is transmitted through shaft, chainI l and sprocketso the spindle of valve -58 which is turned to admit pressure to the left end of the hydraulic cylinders. The head 16 then moves to the )right until ithlas' entered the shoe carrying bar in the right hand air cylinder and hermetically closes the same,

The air cam 67 is so timed that whenfthis .cylinder-has been closed, air pressure is adxnitted to the right hand cylinder at the v,completion of the one-half revolution of the cams.

iflzov righthand end of the hydraulic cylinders and the head 16 moves to the left hand side to Aclose left hand cylinder l2 and admit air -pressure thereto. y

In order .to hold the lasts firmly pressed upon the bars so that an air tight joint will be p roduced between the vented part of the lasts and. the gaskets on the bar, we provide gripper mechanism which will now Abe described.

On opposite ends of the vented bar 18 are mounted the lever arms 37 and 38. These are free to swing on' the bar, being controlled in their movement 1n either direction by stop means hereinafter more fully described. The opposite ends of these arms carry 'a rotatable shaft 32, whose position endwise is controlled by collars and 36.

The portion of the arm 38 which forms the 'journal for shaft has ratchet teeth 33 out upon it which engage with corriesponding teeth '47b upon lever 47, which has its hub free to move endwise on shaft 32, but prevented from turning thereon by a sliding key or spline. The teeth of both levers are kept normally in engagement by a helical spring 42 interposed between the hub and a collar 35 fast on. the shaft.-

At intervals upon shaft 32 are mounted freely, finger pieces or presser arms 34, the downward or counter clockwise movement of which is controlled by pins 34'?? .in their faces which engage with Corresp'endingr pins in shaft 32. The movement of the presser arms in the opposite direction is controlled by coil springs 33 one end of which laps its respective presser arm and the opposite end of which is held in the shaft 32.

1t will be seenv from this that a movement of the lever 47 in a clockwise direction, brings vthe pins 3221 into engagement with the pins 34 causing the presser arms to be `lifted off the heels of the shoes; while a counter clockwise movement of lever 47 is transmitted to the presser arms 34 through the springs 33. causing said presser arms to be pressed on the soles of the footwear with a yielding' pressure. The ratchet teeth 33u and 471 hold the shaft in position to apply pressure until lever 47 is moved longitudinally against the pressure of the spring 42.

0n releasing the lever 47 the spring forces the teeth into engagement and so locks 'the shaft 32 in any angular position to which it may' have been adjusted or the face of the.

,mal position,

turned. The pressure arms are provided with pressure pads 34h.'

To' place the shoes in position fthe lever arms 37 and 38, are swung back to the position shown in dotted lines. (Fig. 3.)

The shoes having been placed in position on. the shoe bar, the lever arms carrying the bar 'are swung up to position shown in'full .lines and by means' of'lever 47 the presser arms are brought down under spring pressure on the heels of the shoes from the po'- sition shown in dotted lines to that shown in, full lines.-

The bars which deliver the shoes to the compressor' carry respectively 8, l() and l2y shoes according to whether they are mens, womens, and misses7 or childrens. Each bar is arranged to carry 12 shoes, so that when less than 12 shoes are placed on the bar, it is necessary to plug the holes in the vented pins which remain uncovered.

To take care of this. each bar is provided. with a valve, in the form of a hollow sleeve l5 which fits the inside of the bore of the bar closely. This sleeve has'slots or holes through its walls opposite the vented pins to be covered. These are so arranged that bv rotating the sleeve all of the holes may be open. or two or four may be covered. The'angular position of-this sleeve is controlled through bevel gears 24, by a hand lever 26 on the outside of the head 16, provided with a spring pin. 27 fitting into the holes in the head, to lock it in the desired position.

To limit the swinging' movement of the lever arms 37 and 38 and lock them in norwe provide the following means: A spring pressed pin 50 is guided in a lug or bracket 5l and has its endadapted to travel over a segment 52 provided at opposite ends with stops 52a and 52". Adjacent stop 52 is a notch or recess (Fig. 3) into which the pin drops to lock the lever arms in normal or operative position and from which it may be withdrawn by handle 5011. Arm 37 carries a lug or projection 37 'adapted to Contact with lugs or pro jections 44 on the head 44 to limit in a similar manner the movement of arm 37.

Instead of last supporting means such as above described. we modif)7 the same as illustrated in Figs. 9 to v11. In this form, each last is held in position by means of two pins 19", 19 one of which 19b is fixed in the bar 18l and the other 19C capable of movement toward and away from the fixed pin. The fixed pin 10b is hollow and forms the vent from the last to the hollow bar 13a. Pin 19C is carried by the sliding member 30 and is held normally away from the lixed pin 19h by the pressure of the spring 32 is a shaft running practically vthe wh )le length of the bar 18a' mounted at intervals and having cams on it, which engage with eXtensions or projections 80a on the sliding pieces 8 0. rl`his shaft is supported from the bar 18PL by` bearings Se and-is limited 'in its angularanovement by the sto'p collar v85 which engages with the stop pin 86.' To one end ofshaft 82 is keyed the operating lever 87.

To place shoes on the bar, moved over to the left into the position shown in dotted line Fig. 9 rotating the shaft 82 and cams 83. The rise on the cams forces the sliding pieces 80, carrying the pins 19c towardv the fixed pins 19h against the pressure of the springs 8l.

The lasts are then placed in position, and

the shaft and cams are rotated to the right by ,means of the lever 87. y The springs Sl then force the sliding pieces 80 to the left, or away from the fixed pins 19h until the linside of 'the opening in the last is gripped, and held, by the pins 19b and 19C.

{aving thusdescribed our invention, what we claim is:

l. An apparatus for compressing articles plastic material comprising a re- 1n cluding ceptacle having an open mouth, a reciproeating head arranged to close said mouth, a form carrier arranged to be moved into and out of said receptacle in unison with the movement of said head, and means for automatically admitting iuid under pres* sure to said receptacle when the same is closed.

2. An apparatus for compressing articles including plastic material comprising a receptacle arrangedto be hermetically closed,

. a hollow form carrier insertible in and receptacle arranged to be` hermeticahy movable therefrom and hating seats for the forms, the interior of the form carrier arranged to communicate with the interior of the forms andals'o with the exterior ofv the receptacle, means for supplying fluid pressure to said receptacle, means for holde seats and ing the forms in place upon their a rock shaft for operating said holding means.

3. An apparatus for compressing articles including plastic material comprising a receptacle adapted to be hermetically closed, a hollow form carrier insertiblein and removable therefrom and having seats for the forms, the interior of the carrier being arranged to communicate with the interior of the forms and also with the exterior of the receptacle, means for supplying fluid pressure to said receptacle, means for holding each of the forms upon its seat, and means for .simultaneously operating all of said holding means.

4c. An apparatus for compressing articles including plastic material comprising a reclosed, a hollow form carrier removable therefrom and having seats for the forms, hollow last the lever 87 `.is I

engaging pins carried by said communicating with the interior of the carrier and adapted to engage the f rms and means for holding the forms on s id pins. An apparatus for compressing articles including plastic material comprisin ceptacle adapted to be hermetically with hollow nipples communicating'with the interior of said carrier, ,and clamping means movable toward and from said nipples.

6. An apparatus forcompressing articles including plastic material comprising areceptacle adapted to be hermetically closed, a hollow form carrier having a plurality of form supporting seats provided with of the forms and meansA for closing one orl more of said openings, comprising a rotatable sleeve within the hollow carrier having non-alining openings. s

S. An apparatus\for compressing articles including plastic material comprising a receptacle, a head. for hermetically closing the same, a hollow form carrier connected with said head, said carrier having form supporting seats, fluid pressure means for movingv said head toward and 'from the 'mouthof-the receptacle, and means for admitting fluid under pressure, to said ref ceptacle when'` closed with the carrier within the receptacle. l

9. An apparatus for compressing articles including plastic material comprising `a re- I-cep'tacle, a head for hermetically closing the same, a hollow form carrier connected with jsaid head, said carrier having form supporting seats or nipples, and iluid pressure means for moving said head toward and from the mouth of the receptacle, and means for automatically admittingv fluid under pressure to said receptacle after` it has been hermetically closed with the carrier within the receptacle.

l0. An apparatus for compressing articles including plastic material comprising'a re-y ceptacle, a head for hermetically closing the same, a hollow form carrier connected' with said head, vsaid form carrier having vform .receiving seats, fluid pressure means for moving said head toward and from the receptacle to insert and withdraw the carrier, means for admitting fluid under pressure to said receptacle when the carrier is cpsed, a hollow form carrier removable th r rom, and having seats for the forms prov1ded seats and y ris izo

mouths, form carriers 'connected with said head and projecting 1n opposite directionsA ing said head toward and from the receptacle, pipe connections for admitting fluid under pressure to and exhausting it from said receptacle when the carrier is in the same, valves controlling said pipe connec tions and the passage of fluid to and from the ram, anda mechanical controlling de vice having operating connections to the stems of said valves.

l2. An apparatus' for compressing articles including plasticmaterial comprising a pair of receptacles having open mouths facing each other, a reciprocating head having faces adapted to alternately closesaid receptacles, form carriersfcoiinected with opposite sides of said head, means for reciprocating'said head, and means for-alternately admitting luid'under pressure to said receptacles.

13. An apparatus for-compressing articles including plastic material comprising a pair of receptacles having 'open mouths facing each other, a reciprocating head having faces adapted to alternately 'close said therefrom, tracks in said receptacles, carriages supporting the outer ends of said carriers and traveling .on said tracks, means for reciprocating said head, and means for alternately admitting fluid under pressure to said receptacles.

14. An apparatus for compressing articles including plastic material comprising a pair of opposedreceptacles, a head having its opposite faces adapted to alternately close said receptacles, form carriers connected,

with said head, a hydraulic ram for moving said head, pipe connections to said ram for fluid supply' and exhaust including a four way valve, pipe connections to said recepclosed.

said' head,l pipe connections to said ram for lluid supply and exhaust including a four- 1 way valve, pipe connections to said receptacles for fluid supply and exhaust including` a pair of three-way valves, a continuousl runnin(r element a air of cams ada t- Y e a ed to loe clutched to said element, means whereby one of said cams operates said fourway valve, means whereby 4the other cam operates the three-way valves, and means for automatically unclutching 'said cams on the completion of a cycle of operations.

1G. An apparatus for compressing articles including plastic material, comprising a receptacllj arranged to be hermetic'ally closed, a form carrier' insertihle in and removable from said receptacle and having .seats for forms, means for holding each of the forms upon its seat, means for simultaneously op.- eratiiig all of said holding means, and means for supplying fluid under pressure to said receptacle.

17. An apparatus for compressing articles including' plastic material, comprising a receptacle, a head for hermetically closing the same,a hollow form carrier connected with said head, fluid pressure means for moving said head toward and from the mouth of the receptacle, and means for supplying fluid under pressure to said receptacle when In. testimony whereof, we aflix our signatures in presence of two Witnesses.

ALFRED A. eLinDEN. Ene-Aa r. noRMAN. e. L. iuNcH.

Witnesses: EMMA Gr. COLLINS, S. LcUIsn` S'rnnvns. 

